Examples of TerrainQuad

com.jme3.terrain.geomipmap.TerrainQuad
TerrainQuad is a heightfield-based terrain system. Heightfield terrain is fast and can render large areas, and allows for easy Level of Detail control. However it does not permit caves easily. TerrainQuad is a quad tree, meaning that the root quad has four children, and each of those children have four children. All the way down until you reach the bottom, the actual geometry, the TerrainPatches. If you look at a TerrainQuad in wireframe mode with the TerrainLODControl attached, you will see blocks that change their LOD level together; these are the TerrainPatches. The TerrainQuad is just an organizational structure for the TerrainPatches so patches that are not in the view frustum get culled quickly. TerrainQuads size are a power of 2, plus 1. So 513x513, or 1025x1025 etc. Each point in the terrain is one unit apart from its neighbour. So a 513x513 terrain will be 513 units wide and 513 units long. Patch size can be specified on the terrain. This sets how large each geometry (TerrainPatch) is. It also must be a power of 2 plus 1 so the terrain can be subdivided equally.

The height of the terrain can be modified at runtime using setHeight()

A terrain quad is a node in the quad tree of the terrain system. The root terrain quad will be the only one that receives the update() call every frame and it will determine if there has been any LOD change.
The leaves of the terrain quad tree are Terrain Patches. These have the real geometry mesh.
Heightmap coordinates start from the bottom left of the world and work towards the top right.
```
 +x ^ | ......N = length of heightmap | :     : | :     : | 0.....: +---------> +z (world coordinates) 
```
@author Brent Owens

Examples of com.jme3.terrain.geomipmap.TerrainQuad

        /**
         * Optimal terrain patch size is 65 (64x64).
         * The total size is up to you. At 1025 it ran fine for me (200+FPS), however at
         * size=2049, it got really slow. But that is a jump from 2 million to 8 million triangles...
         */
        terrain = new TerrainQuad("terrain", 65, 513, heightmap.getHeightMap());//, new LodPerspectiveCalculatorFactory(getCamera(), 4)); // add this in to see it use entropy for LOD calculations
        TerrainLodControl control = new TerrainLodControl(terrain, getCamera());
        terrain.addControl(control);
        terrain.setMaterial(matTerrain);
        terrain.setModelBound(new BoundingBox());
        terrain.updateModelBound();

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Examples of com.jme3.terrain.geomipmap.TerrainQuad

          /**
           * Optimal terrain patch size is 65 (64x64).
           * The total size is up to you. At 1025 it ran fine for me (200+FPS), however at
           * size=2049, it got really slow. But that is a jump from 2 million to 8 million triangles...
           */
          terrain = new TerrainQuad("terrain", 65, 513, heightmap.getHeightMap());
          TerrainLodControl control = new TerrainLodControl(terrain, getCamera());
          control.setLodCalculator( new DistanceLodCalculator(65, 2.7f) ); // patch size, and a multiplier
          terrain.addControl(control);
          terrain.setMaterial(material);
          terrain.setLocalTranslation(0, -100, 0);

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Examples of com.jme3.terrain.geomipmap.TerrainQuad

        /**
         * Optimal terrain patch size is 65 (64x64).
         * The total size is up to you. At 1025 it ran fine for me (200+FPS), however at
         * size=2049, it got really slow. But that is a jump from 2 million to 8 million triangles...
         */
        terrain = new TerrainQuad("terrain", 65, 513, heightmap.getHeightMap());//, new LodPerspectiveCalculatorFactory(getCamera(), 4)); // add this in to see it use entropy for LOD calculations
        TerrainLodControl control = new TerrainLodControl(terrain, getCamera());
        terrain.addControl(control);
        terrain.setMaterial(matTerrain);
        terrain.setModelBound(new BoundingBox());
        terrain.updateModelBound();

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Examples of com.jme3.terrain.geomipmap.TerrainQuad

            if (spatial instanceof TerrainQuad) {
                Boolean bool = spatial.getUserData(UserData.JME_PHYSICSIGNORE);
                if (bool != null && bool.booleanValue()) {
                    continue; // go to the next child in the loop
                }
                TerrainQuad terrain = (TerrainQuad) spatial;
                Transform trans = getTransform(spatial, realRootNode);
                shape.addChildShape(new HeightfieldCollisionShape(terrain.getHeightMap(), trans.getScale()),
                        trans.getTranslation(),
                        trans.getRotation().toRotationMatrix());
            } else if (spatial instanceof Node) {
                createCompoundShape(realRootNode, (Node) spatial, shape, meshAccurate, dynamic);
            } else if (spatial instanceof TerrainPatch) {
                Boolean bool = spatial.getUserData(UserData.JME_PHYSICSIGNORE);
                if (bool != null && bool.booleanValue()) {
                    continue; // go to the next child in the loop
                }
                TerrainPatch terrain = (TerrainPatch) spatial;
                Transform trans = getTransform(spatial, realRootNode);
                shape.addChildShape(new HeightfieldCollisionShape(terrain.getHeightMap(), terrain.getLocalScale()),
                        trans.getTranslation(),
                        trans.getRotation().toRotationMatrix());
            } else if (spatial instanceof Geometry) {
                Boolean bool = spatial.getUserData(UserData.JME_PHYSICSIGNORE);
                if (bool != null && bool.booleanValue()) {

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Examples of com.jme3.terrain.geomipmap.TerrainQuad

     * Creates a HeightfieldCollisionShape if the supplied spatial is a TerrainQuad.
     * @return A MeshCollisionShape or a CompoundCollisionShape with MeshCollisionShapes as children if the supplied spatial is a Node. A HeightieldCollisionShape if a TerrainQuad was supplied.
     */
    public static CollisionShape createMeshShape(Spatial spatial) {
        if (spatial instanceof TerrainQuad) {
            TerrainQuad terrain = (TerrainQuad) spatial;
            return new HeightfieldCollisionShape(terrain.getHeightMap(), terrain.getLocalScale());
        } else if (spatial instanceof TerrainPatch) {
            TerrainPatch terrain = (TerrainPatch) spatial;
            return new HeightfieldCollisionShape(terrain.getHeightMap(), terrain.getLocalScale());
        } else if (spatial instanceof Geometry) {
            return createSingleMeshShape((Geometry) spatial, spatial);
        } else if (spatial instanceof Node) {
            return createMeshCompoundShape((Node) spatial);
        } else {

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Examples of com.jme3.terrain.geomipmap.TerrainQuad

        this.patchSize = size - 1;
    }


    public TerrainQuad getTerrainQuadAt(Vector3f location) {
        HeightMap heightMapAt = getHeightMapAt(location);
        TerrainQuad q = new TerrainQuad("Quad" + location, patchSize, quadSize, heightMapAt == null ? null : heightMapAt.getHeightMap());
        return q;
    }

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Examples of com.jme3.terrain.geomipmap.TerrainQuad

    }


    public TerrainQuad getTerrainQuadAt(Vector3f location) {
        String modelName = assetPath + "/" + name + "_" + Math.round(location.x) + "_" + Math.round(location.y) + "_" + Math.round(location.z) + ".j3o";
        Logger.getLogger(this.getClass().getName()).log(Level.FINE, "Load terrain grid tile: {0}", modelName);
        TerrainQuad quad = null;
        try {
            quad = (TerrainQuad) manager.loadModel(modelName);
        } catch (Exception e) {
//            e.printStackTrace();
        }

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Examples of com.jme3.terrain.geomipmap.TerrainQuad

    public void setQuadSize(int quadSize) {
        this.quadSize = quadSize;
    }


    private TerrainQuad createNewQuad(Vector3f location) {
        TerrainQuad q = new TerrainQuad("Quad" + location, patchSize, quadSize, null);
        return q;
    }

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Examples of com.jme3.terrain.geomipmap.TerrainQuad

        return heightmap;
    }


    public TerrainQuad getTerrainQuadAt(Vector3f location) {
        HeightMap heightMapAt = getHeightMapAt(location);
        TerrainQuad q = new TerrainQuad("Quad" + location, patchSize, quadSize, heightMapAt == null ? null : heightMapAt.getHeightMap());
        return q;
    }

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